H&N - Brain Flashcards
Sinuses of the brain
Meninges of the brain
Dura
Arachnoid
Pia
Falx cerebri
Inner meningeal layer of dura mater
Diaphragm sellae
Covers hypophysial fossa
Has an opening to allow infundibulum of pituitary to connect to base of brain
It’s reflection of dura mater
Arterial supply to dura mater
Anterior meningeal artery
Middle meningeal artery
Posterior meningeal artery
Anterior meningeal artery branch of?
Ethmoid arteries
Middle meningeal artery branch of
maxillary artery
Posterior meningeal artery branch of
Ascending pharyngeal
Occipital
Vertebral
Where is CSF produced
Choroid plexus in lateral, 3rd and 4th ventricles
Where is CSF reabsorbed
Through arachnoid villi which project as clumps (arachnoid granulations) in superior sagittal sinus
Branches of internal carotid artery
Only press carotid arteries momentarily
Only = Opthalmic Press = Posterior communicating Carotid = Choroidal Arteries = Anterior cerebral Momentarily = Middle cerebral
Circle of Willis anatomy
Branches of vertebral artery
Anterior spinal
Posterior spinal
Posterior inferior cerebellar
Branches of basilar artery
Anterior inferior cerebellar artery
pontine arteries
Superior cerebellar artery
Posterior cerebellar artery
Dural venous sinuses
Structures draining into dural sinuses
Diploic veins
Emissary veins (allow infection from outside in)
Structures passing through cavernous sinus
CN6
internal carotid artery
Structures passing through lateral wall of cavernous sinus
CN3, 4, V1, V2
Parasympathetic ganglia
Ciliary
Pterygopalatine
Otic
Submandibular
Nerve of ciliary ganglion
Oculomotor
Function of ciliary ganglion
Pupillary constriction
Eye accommodation
Pterygopalatine ganglion nerve
Greater petrosal nerve: facial nerve
Function of pterygopalatine ganglion function
Innervation of
Lacrimal gland, mucous glands of nasal cavity, maxillary sinus and palate
Otic ganglion nerve
lesser petrosal nerve of CN9
Otic ganglion function
Innervation of parotid gland
Submandibular ganglion nerve
chorda tympani to lingual (CN7)
Function of submandibular ganglion
innervation of submandibular and sublingual glands
Clinical finding in oculomotor palsy
Dilated pupil
Eye go down and out
Clinical findings in trochlear palsy
Eyes cant look down and in
cant look downstairs
Gross anatomy of saggital section of brain
thalamus surrounds 3rd ventricle
Mamillary bodies inferior surface of hypothalamus
Which part of cortex responsible for sensory/motor
Precentral gyrus motor
Post central gyrus sensory
Position of Brocca vs Wernicke’s areas
Brocca- speach, frontal lobe
Wernickes- comprehension, temporal lobe
Hypothalamus anatomy
pituitary attached inferiorly by infundibulum (pituitary stalk)
mamillary bodies anterior
floor of 3rd ventricle
Which cranial nerve doesnt originate from brainstem
CN11
Forms from roots of top 5 cervical spine
Goes up through foramen magnum
Comes down through Internal jugular foramen
